1 /*- 2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Vybrid Family Timing Controller (TCON) 29 * Chapter 58, Vybrid Reference Manual, Rev. 5, 07/2013 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <sys/malloc.h> 41 #include <sys/rman.h> 42 #include <sys/timeet.h> 43 #include <sys/timetc.h> 44 #include <sys/watchdog.h> 45 46 #include <dev/ofw/openfirm.h> 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 #include <machine/bus.h> 51 #include <machine/cpu.h> 52 #include <machine/intr.h> 53 54 #include <arm/freescale/vybrid/vf_common.h> 55 56 #define TCON0_CTRL1 0x00 57 #define TCON_BYPASS (1 << 29) 58 59 struct tcon_softc { 60 struct resource *res[1]; 61 bus_space_tag_t bst; 62 bus_space_handle_t bsh; 63 }; 64 65 struct tcon_softc *tcon_sc; 66 67 static struct resource_spec tcon_spec[] = { 68 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 69 { -1, 0 } 70 }; 71 72 uint32_t 73 tcon_bypass(void) 74 { 75 struct tcon_softc *sc; 76 77 if (tcon_sc == NULL) 78 return (1); 79 80 sc = tcon_sc; 81 82 WRITE4(tcon_sc, TCON0_CTRL1, TCON_BYPASS); 83 84 return (0); 85 } 86 87 static int 88 tcon_probe(device_t dev) 89 { 90 91 if (!ofw_bus_status_okay(dev)) 92 return (ENXIO); 93 94 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-tcon")) 95 return (ENXIO); 96 97 device_set_desc(dev, "Vybrid Family Timing Controller (TCON)"); 98 return (BUS_PROBE_DEFAULT); 99 } 100 101 static int 102 tcon_attach(device_t dev) 103 { 104 struct tcon_softc *sc; 105 106 sc = device_get_softc(dev); 107 108 if (bus_alloc_resources(dev, tcon_spec, sc->res)) { 109 device_printf(dev, "could not allocate resources\n"); 110 return (ENXIO); 111 } 112 113 /* Memory interface */ 114 sc->bst = rman_get_bustag(sc->res[0]); 115 sc->bsh = rman_get_bushandle(sc->res[0]); 116 117 tcon_sc = sc; 118 119 return (0); 120 } 121 122 static device_method_t tcon_methods[] = { 123 DEVMETHOD(device_probe, tcon_probe), 124 DEVMETHOD(device_attach, tcon_attach), 125 { 0, 0 } 126 }; 127 128 static driver_t tcon_driver = { 129 "tcon", 130 tcon_methods, 131 sizeof(struct tcon_softc), 132 }; 133 134 static devclass_t tcon_devclass; 135 136 DRIVER_MODULE(tcon, simplebus, tcon_driver, tcon_devclass, 0, 0); 137